TOSHIBA TCB-PCMO4E External Master On-Off Control Board Installation Guide
- June 12, 2024
- Toshiba
Table of Contents
TOSHIBA TCB-PCMO4E External Master On-Off Control Board
Product Information
Product Name: External master ON/OFF control board
Model: TCB-PCMO4E
Compatible Models: SMMS-u or SHRM-A
Manufacturer: TOSHIBA
Precautions for Safety
Please read the Installation Manual of the outdoor unit for safety precautions.
External View
Dimensions: 55.5mm x 45.5mm
NCC-1214
Terminal block (M3)
Accessories
| No. | Part Name | Q’ty |
|---|---|---|
| 1 | Connection cable | 1 |
| 2 | Support to fix the board | 4 |
| 3 | Earth screw | 2 |
| 4 | Binding band A | 4 |
| 5 | Clamp filter (DIA. 20) | 2 |
| 6 | Binding band B | 2 |
| 7 | Clamp filter (DIA. 30) | 1 |
| 8 | Wire clip | 1 |
| 9 | Cable strap | 3 |
Product Usage Instructions
Installation
- Before starting installation work, ensure the power supply is turned OFF.
- Install the optional PCB at the specified position inside the electrical components box as shown in the figure.
- Use the fixing support to install the optional PCB at the specified location inside the electrical components box. There arefour mounting holes for the support to fix the board at specified locations.
- Connect the connector (PJ17) on the optional PCB to the connector (CN513) on the interface PCB using the provided connection cable.
- Tie the connection cable using binding band A.
- Attach the clamp filter to the connection cable and attach another clamp filter to the input wiring. Use binding band B to fix the clamp filters to the wiring.
- Band the redundant connection cable and tie them with binding band A.
- Fix the connection cable and input wiring with wire clip and cable strap as shown in the figure.
Operation and Wiring Diagram
The external master ON/OFF control board allows batch operation or batch stop of indoor units connected to the outdoor unit. The operation is performed in the previously active mode.
To control the outdoor unit, connect the header unit (U1) to the outdoor unit interface PCB using the provided connection cable. Use the operation input switch (SW1) and stop input switch (SW2) for controlling.
When sending a batch-designated signal, turn off SW1 before sending the signal to perform batch operation on indoor units.
Precautions for Safety
As for the Precaution for Safety, please read the Installation Manual of
outdoor unit.
External View
Accessories
Installation
- Before starting installation work, be sure to turn the power supply OFF.
- Install the “optional PCB” at the position on the electrical components box shown in the figure below.
- Install the “optional PCB” at the specified location inside the electrical components box using the fixing support.
- There are four mounting holes for the support to fix the board (2) at specified locations inside the electrical components box.
- Connect the connector (PJ17) on the “optional PCB” to the connector (CN513) on the “interface PCB” using the connection cable (1) . (See figure on right.)
- The cable (provided) is long. Tie it using the binding band A (4).
[PCB Installation Position] PCB: Printed Circuit Board
Details of Operation, Wiring Diagram
External master ON/OFF Control
-
COM terminals have DC12 V output with a basic insulation.
Use a switch (relay or photocoupler) insulated from the controller (locally procured) for SW1 or SW2. -
DC12 V has a current-limiting resistor of 3.3 Ω.
-
For non-voltage contacts for each terminal, use a contact with minimum applicable load of DC12 V and 3 mA or less.
Model : SMMS-u, SHRM-A
Functions
Indoor units connected to the outdoor unit can be batch-operated or batch-
stopped by connecting to the interface PCB of those outdoor units. Batch
operation is performed in the previously active mode.
Operation
The outdoor unit connection is for the header unit (U1).
SW1: Operation input switch
SW2: Stop input switch
- Input signal is detected in the rising edge between OFF and ON of SW1/SW2 and the control is accepted in 100 msec from the edge.
- When COOL terminals (SW1 and SW2) are simultaneously turned ON, the control turned ON first is valid, and the control turned ON later is invalid.
CAUTION
- Be sure to provide no-voltage pulse contacts for each terminal.
- Hold the ON state for at least 100 msec.
- Do not turn SW1 and SW2 ON simultaneously
Night operation (sound reduction) control
Model : SMMS-u, SHRM-A
Functions
The rotation speed of the compressor and fan can be restricted during input of
the night time signal to reduce noise by connecting to the interface PCB of
outdoor units.
Operation
The outdoor unit connection is for the header unit (U1).
CAUTION
Be sure to provide no-voltage continuous contacts for each terminal.
Operation mode selection control
Model : SMMS-u, SHRM-A
Functions
The heating/cooling mode of the system can be selected by connecting to the
interface PCB of outdoor units.
Operation
The outdoor unit connection is for the header unit (U1).
SW1: Cooling mode specified input switch
SW2: Heating mode specified input switch
| Input Signal | Operation: Selected operation mode |
|---|---|
| Cooling (SW1) | Heating (SW2) |
| OFF | OFF |
| ON | OFF |
| OFF | ON |
The statuses of indoor units operating in a mode other the selected operation
mode can be switched by setting the outdoor DN Code of the header outdoor
unit.
For setting the Outdoor DN Code (O.DN), refer to Owner’s Manual of the outdoor
unit.
CAUTION
Be sure to provide no-voltage continuous contacts for each terminal. Snowfall
Fan Control
Model : SMMS-u, SHRM-A
Functions
The outdoor unit fan operates at snowfall by connecting to the outdoor unit
interface PCB.
Operation
Header outdoor unit
SW1: Snowfall detection switch (snowfall sensor)
CAUTION
Be sure to provide no-voltage continuous contacts for each terminal.